Machine for drilling bolts and other work.



Ex-v. HSHBURNE. l l 'MACHINE ORBRILLNG BOLTS AND OTHER WORK 1,034,436.-

APPLIQTION YTLED NOV. 4, 1911.

Eatented Aug'. 6

1912. Smm: 1,

4 SHEETS* @E @a @WQ @N w @MQ ,uw a

Y E. WFHEURNR l MACHINE FOR DEILLING BUMS AND G'IIEUE'EWRK..`

1912. 4 snmsfsmm 2.

APPLICATION FILED M51( 1.911.

Patetea Aug. 6,

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B. W. FSHBURNB. MACHINE FOR DRILLING- BOLTS AND OTFERv WORK'.

APPLNATION FILED NOVA, 1911. y Y

' Patented Aug. 6, 1912.

Patented Aug'. 6, 1912..

4 SHEETS-SHEET 4,

To all whom 'it may concern:

`the like l not `verri;ion also aims to i class oit-devices and torender Vt em more Lilf smarts More. vise-INIA, A CORPORATION.

Be it known that I, EDWARD VINBURN FIsneUnNn, a citizen of the UnitedStates, residing at Richmond, in thecounty of Henricoand State ofVirginia, have invented certain new and useful Improvements in Machinesfor Drilling Bolts and, other lVork, of which the following ingdrawings.

This invention.comprehends certain new and useful improvements indrillingfmachines for use in drilling stay-holts for locomotive fireboxes and for drilling other analogous devices, and relates particularlyto machines of the automatic type which are designed to drill the boresAof the stay-bolts, for instance, while they are carried around in are'voluhle work holder and to discharge the stay-bolts after their boreshave been finished, the present invent-ion improvement on the machineLetters Patent of the United 1,621,242 were March 26, 1912;

The invention has for .its primary object an improved automatic drillingmachine of this charactenvthe parts of which are so arranged that thedrills will be automatically withdrawn one or more times during thedrilling operation,'whereb`y to clear the bores. of the shavings orborings, 'and subsequently by automatic means. moved forward to theiroperative position until the bores vfor which y States No. issued on myapplication have -been entirely completed, whereupon 'the drills will beentirely withdrawn until a succeeding operation is commenced.

The invention also has for its object a simple, .durable and efficientconstruction of means for securely holding the staybolts or 'only asagainst any movement abouti-heir longitudinal axes, but also .as againstendwise displacement. And the i`ngenerally im ro've this usenl'andcommercially desirable. y Fiith these and other objects in view,will-"more 'nlly appear as the description proceeds,",jthe inventionconsists in certain constructions, arrangements and combinations of. theparts that I shall. hereinafter :lnlly describe and claim. 1 1

For a full,y understanding of the invention,

Specification or Letters Patent.V Application filed.v November 4, 1911.

` reference is to he had is a specifica. tion, reference being had tothe accompanybeing an Patented Aug. 6, i912. serai No. 658,542.

to the following description and accompanying drawings in which7 Figurelis a top plan view of a drilling machine embodying the improvements ofFig. 3 is a longitudinal sectional 'View of the machine. Fig. 4 is adetail sectional 'view on.' a plane indicated by the li11e'cz-a, of Fig.3. Fig. 5 isa detail view of one of the drill shafts andits componentparts partially in sect-ion ahd partially in side elevation. Fig. 6 is adetail perspective view of the cam member hereinafter specifically de- 2is an elevation thereof.

scribed. Fig. 7 is a. detail transverse sectional view on the line -b,of Fig. 4. Fig. 8 is a detail view of one of the bolt clainping devices,and, Fig. 9 is a detail view of one kof the relatively stationaryAblocks de- Signed to co-act with the bolt clamping devices to hold thebolts securely in position while being worked upon. A Referring tothedrawings, the numeral 1 designates the frame-work of my improveddrilling machine which is provided atV its ends with standards 2 andwhich is, in the present instance, mounted upon feet A supporting sha-ft4l lis mounted in openings ormed for it in the upper ends of thestandards 2 and is secured in said' openings in any desired way, as byset screw 5.

Mounted upon the shaft a at'ahout the middlegthereof, is a revoluhledrill carrier which embodies a sleeve l2, and longitudinally'spacedheads being formed on its gear teeth 14 adapted to mesh with a worm 4 8on a shaft 46 which is journaled in uprights or standards L5seen-red toor formed 3 and 15,the head 13 periphery with worm on the base of theframe-work l. The shaft 46, also carries a bevel pinion 47 which mesheswith a corresponding but smaller ,pinion 43 secured on one end of alongituf dinally disposed shaft 41 journaled on a standard or post 40.The shaft 41 also carries a pulley -l-2, around which a band 44 passes,said band also passing yaround a piilley l0 which is formed on va sleeve6 mounted to turn on the supporting shaft t.

and formed with ,a reduced Ahuh extremity 7 journaled Iin the bearing Swhich is formed 1n onel of the standards 2, as clearly illnstrated inFig. 3.

The sleeve 6 is also formed y Y with a band wheel 9 by which power isap-A l Afrom one face of the head 13 at the rim or edge thereof, saidpinions 39 having a, groove and feat-her connection 33 with drill shafts17, whereby the shafts willbe permitted to move longitudinally, but willbe compelled to turn as the pinions are rotated by the gear wheel 11.Any desired number of shafts 17 and component parts may be employed.Each shaft is provided intermediate of its ends with a collar 18, asbestillustrated in Fig. .5, adapted to abut against one end of sleeve 26mounted upon the shaft and held thereon by nuts 29 and 30 and,y anintervening washer 31 of fiber or the like. Each shaft 17 is formed atone end with a threaded socket adapted to hold a threaded drillsupporting stem 20, the latter in turn being formed with a tapcringsocket 22 to receive the tapered head Q3 ot' a drill 24. r1`he inner endof the socket 22 terminates in a transverse opening 19, whereby asuitable tool may be inserted therein to drift the drill out of itssocket when it is desired to remove the drill. The sleeves 26 aremounted in and movable longitudinally through openings that are formedin the head 15 of the drill carrier and are provided at one end withlaterally projecting pins 33, on'which rollers 3l are journaled. rollersare adapted to be engaged, in turn, as the drill carrier rotates aboutthe shaft 4 as an axis, by a cam member S7 which is supported by aforked bracket S9 supported on the base of the frame-Work 1. YIn thepresent embodiment of the invention, the cam member 87 is formed withangular cam sections 97, 9S and 99 adapted to co-act with the adjoiningface of the cani meniber, vwhereby as rthe rollers 341 are carriedaround between one face of the earn member S7 and the co-aetingv angularcam seetions 97, 98 and 99, the drills, after having been once fed intothe work for the initial portion of the operation, will be `ilrstpositively withdrawn by engagement with the angular cam section 9T, willthen be ted back into the work a greater distance than before, will thenbe again positively withdrawn to remove the boi-ings or shavings asbefore, and will then be finally fed to ward again by the cam faceitself to complete the bore, afterwhich'the angular cam section A99 willcome into play and positively and entirely withdraw the drill from thebore, while at the same time, the bolt clamping devices of the workholder will release tbc-bolt and permit the finished bolt to These heldand preferably the head 50 is formed y in sections designated 51 and 52,the sec-n tion being formed with openings having guiding bushings 60secured therein for the purpose of accurately guiding the drills 521i tothe work. Preferably, these bushings 6() are held detachably in place,whereby diferent sized bushings maybe used, according to the diameter ofthe drilling tool employed. ln order to adjust the'work holder in size,for bolts of different lengths, the tie bolts 53 which connect one headto the other, are relatively long and have ad- The bolt clamping devicesinclude clamping members 68 which are pivotally connected, as at 68, toone face of the head section 51, each of said clamping members embodyingthree arms, one of which carries a' roller 69 adapted to bear againstand ride upon cam 57 which is carried by a bushl justable connectionwith one of the heads.

ing 56 litting in the 'flangedv end 16 of they,

sleeve 12 and encircling the supporting shaft li Springs' 79 areprovidedl to hold the rollers 69 seci'irelylfagainst the edge of the cam57, said cam being provided at one point with a recessed portion,whereby when the rollers reach such portion, the clamping members willbe rocked in a di rect-ion to release their hold lon the bolts andpermit them to drop. Thev clamping member 68 has connected to one 'ofits arms at 70, a yieldable rocker bar 73 yifhich is adjustablyeonnected'to the roller carrying the arm of the member by an adjustinglscrew 7l to limit the movement in one di rection and which is springpressed to yield in the opposite direction by means of a spring 75, thetensionot which may be ad-s justed by a screw 7 6 carried by the otherarm ol the clamping member. Thus the clamping member will be permittedto yield should occasion require as, for instance, were a bolt4 or otherobject of larger diameter than that for which the machine had beenadjusted, to be fed to tli.e.machine. Each rocker bar 73- is serrated onone edge to form a jaw 72 designed to co-act with a relativelystationaryV jaw 8l which is formed by the serrated edge oia block 8,0secured to the head 50. The serrations or 'these two jaws extendlongitudinally oi the'bolt and transversely as regards the threadsthereof, whereby the belt will vbe prevented from turning about itslongitudinal axis as it is bein ln order to preventA endwise dispcementbored. f

of theboltf provide other jaws which are 131 termed by bleek@ e2 and Sesecured t0 the 170612915 bars 73a and the .blocks 80,.I'SPC tively,byscrews or similar fastening devices. These last named jaws are formedLwith grooves or corrugations that extend coincident' with and pretereblvabout the same pitch as the threads of the bo1t,

whereby they will securely engage with su/e'h 'threads Withoutiujuringthe sameVand coacting with the rst named jaws, prevent the boltfrom moving.

Preferably, the section 51 is connected to the section Vo?, by mea-ns ofset screws 58, the section 51 being formed with curvedl slots 59concentric with the shaft 4, three; jh which slots the set screwsextend., 'e heads of these set screws, by bearingagainst the bottoms ofthe ses. een@ ae Seesen 51 a be rigidly secured te the section 52 in anydesired angular adjustment.

Frein the foregoing description in connection with the accompanyingdrawings, the operation of my improved drilling ma- Chiu@ will beapparent; ln the practical use of the devicdas the drill carrier iskrotated slowly bythe engagement ofthe worm 4S with the toothed head 13,the Worky earrier will also be rotated and the drill shafts 17 will berapidly rotated about their own axes by the engagement of the pinions,a9, l

with the gear wheel 11. During'. the combined rotary and revolublemovements of the drill shafts 17, they will be moped forwardly undbackwardly by the co-acting angulaieamsections 97, 98 and 9,9, adjoiningcam surfaces of the are of the cam member 87, whereby the tools) willfirst partially form' the bore and then, be retracted therefrom a `number of times so as to clear the bore the shatijnew and'borings, thetools heir-@drilled pleted, at which tlm other receptacle.

withdrawing opw rave been. fully 'com the cam section 99 will act t0entirely Withdraw the tool from the. bOI'Q, White at the'salne time, thecorrespond-ing clamping member 68 will reinto the bolts, after eacheration until the be,

'loose its hold on the bolt and permit the completed article to dropinto 'the tray or` What I claim 1. A drilling machine of the characterdescribed, including a revoluble drill ear= rier, a drill supportingshaft movable long-ie I tudinally therein, means fori rot-ating the,

drill carrier, means; to rotate the shaft in the drill carrier, andautomatic means for first growing the drill shaft forwardly, thenwliiclribwas first moved forward and nally .entirely retracting thedrill from the Work.

described, including ret-clubic drill carrier, a pluralityv of'drillshafts mounted to rotate in, seid" drill carrier and movablelongllkldllnaiiy therein, means for rotating tlie`-drill carrier, andmeans for automati- @ally moving each drill shaft forwardly andrearwardly alternately aV plural number 0f times during the revolublemovement of the drill carrier, said means oomprising rollers movablelongitudinally With the shafts, and a cam member formed with a cam faceand coacting cam sections spaced therefrom on opposite sides of the saidrollers.

bolt receiving` notches, clamping members adapted, to engage boltsreceived in said gitehes and formed with means' for preventing the boltsfrom turning axially and from moving longitudinalty, and blocks our'.ried by one of the, heads and formed with COI'IGSPQDQMQ means adapted toco-act with i @he E@ 0;@ "the clamping members.

.1li a Aiilng maehinecf the ,character l desrlbhd, a Work carrier,including a head l @Need with bolt receiving notches, clamp- Tersely'extendingserrations adapted to en- EDWARD W. risHiuRNE.

Witnesses:

J. R. MoBoYDn,l

C. G. HeMMAoK.

. retreating 1t, subsequently moving -it foirvv ard again a dlstancegreater than that into path of movement. of

2- A drilling mae-lame of the character 3. In a drilling machine of thecharacter described, a revoluble Work holder, embodying longitudinallyspared heads, a supportj 30,' therefor, the heads being formed with fling arms mounted on said head at oneside of: Said and formedwithHirans-i 9.5 l age the bolts, blocks secured to said mem 4'

